[PATCH] D114999: [AMDGPU] Kill def when folding immediate in two-addr pass

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec created this revision.
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Two-address pass works right before RA and if an immediate
was folded into an instruction there is nothing to remove
the dead def. We end up with something like:

  v_mov_b32_e32 v14, 0xc1700000
  v_mov_b32_e32 v14, 0x41200000
  v_fmaak_f32 v51, s67, v19, 0xc1700000
  v_fmaak_f32 v38, v51, v19, 0x4120000

The patch kills the dead move instruction right in the folding.


https://reviews.llvm.org/D114999

Files:
  llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
  llvm/test/CodeGen/AMDGPU/mul24-pass-ordering.ll
  llvm/test/CodeGen/AMDGPU/twoaddr-fma.mir

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